Gate for pouring pipe-joints



R. B. AND C. A. HOWELL.

GATE FOR POURING PIPE JOINTS.

APPLICATION FILED MAY 1J 1920.

d# www# Patented Sept. 6, 1921.,

entre!) srareseareiar ortica.

ROBERT IB. HOWELL, OF OIVlAHA,Y NEBRASKA, AND CHARLES A. HOWELL, OF ANN f ARBOR, MICHIGAN.

GATE FOR POURING PIPE-JOINTS.

Specification of Letters Patent.

Patented Sept. 6, 1921..

Application led May 7, 1920. Serial No. 379,655.

To all whom it may concern: i

Be it known that we, ROBERT B. HOWELL and CHARLES A. HOWELL, citizens of the United States, and residing, respectively, at Omaha, in the county of Douglas and State of Nebraska, and Ann Arbor, in the county of Washtenaw and State of Michigan, have invented certain new and useful Improvements in Gates for Pouring Pipe- Joints, of which the following is a specification.

This invention has reference to an improved form of gate for pouring pipe joints. The structure is adapted more particularly for use in conjunction with a jointing material which is not calked and in which a certain head is necessarily employed to produce a proper pressure at the upper portion of the joint in order that the material at such upper portion will have such solidity as to prevent seepage or leakage therethrough. The gate is designed to be employed with a jointing material such as is set fourth and claimed in Letters Patent 1,290,204, granted to R. B. Howell, under date of January 7, 1919, and as above noted it is necessary that a certain head be present in the pouring of the material.

It has been found in practice that the pressure necessary to effect a tight' joint at the upper part of the bell, or where the gate is located, is approximately seven or eight inches. Ordinarily a clay gate has been employed7 but it has been found from experience, that workmen will not take the trouble to build th@J gate up to the proper height and defective joints have therefore resulted. The present invention has for its main object the production of a ready made gate whereby A roper height is always insured and all that is left for the workman to do is to position the gate and see that it is filled in the act of pouring.

l The invention is allustrated in the accompanying drawings, wherein,-

Figure 1 is a vertical longitudinal section of two sections of apipe with a gate and its forming plug and attendantV elements in position; j

Fig. 2 a horizontal sectional view taken on the line 2 2 of Fig. 1;

Fig. 3 a vertical sectional view showing the plug removed from the gate;

Fig. l a perspective view of one of the gates in .its eellapsed ferm; and

Fig. 5 a similar view showing a modified non-collapsible form.

It is designedthat the gate proper shall be made of such substance as will not be e'ected by the material entering intoV the jomtmg composition. The material must be cheap and the gates so made that they may be readily transported without taking up too much space.

The jointing material set forth in the above mentioned patent has a melting temperature which is not sutiiciently high to burn or distroy the material of which the gate is formed, and advantage has been talren of this in the present instance in the utilization of paper or rubber to produce the gate. Paper is preferable to rubber, but as just noted, rubber may be employed.

Referring to the construction shown in Figs. 1 to 5 inclusive, 1 and 2 denote the ends sections of two contiguous pieces of pipe provided respectively with the bell 3 and spigot end 4;. A suitable dani 5 is placed about the mouth of the bellV after the spigot has been properly entered, and the ends thereof are drawn rearwardly along the pips 2 and held by a clamp, as 6. The gate proper is denoted by 7, and, as above indicated, will preferably be formed of paper. 1t is cut away on one side at its lower end leaving an opening 8, or, in other words, it may be said to be provided with downwardly extending foot piece of semicircular section 9. The opening 8 is placed toward the "mouth of the bell and clay, or other suitable luting material, denoted by 10, is placed about the lower outer portion of the gate adjacent the dam in order to effect a tight closure between the parts. The `frusto-conical peg 11 is placed in the gate when the saine is positioned in order to prevent its collapsingor being deformed in the act of placing the luting 10 about the same, and after such luting is positioned the peg is withdrawn. rPhus there is formed a gate extending upwardly from the joint, as best indicated in Fig; 3. The joint is then ready to be poured and the operator merely has to fill the gate up to a point near its upper end to insure a proper' head being present, such as will effeet a suiiicient degree of pressure on the upper part of the joint between the spigot and the bell. When the material is set the dam and luting are removed. The paper gate may then be torn off of the solidified material and such projecting part knocked Y away leaving the joint intact and complete,

or the breakage may be effected, the paper thereafter torn off and the excess jointing.v

gate is employed glazed or hard finished paper is not wholly satisfactory because when folded for shipping the surface finish is broken and the jointing material will adhere to the creases. ln Fig. 5 there is shown a gate formed of a heavier material than that disclosed in the other figures, as, for instance, heavy glazed hard finished or oiled paper and suchv gates may be nested together insteadV of folded for shipment. 1*ililh'ere such gates are employed the use of the gate peg 11 is not essential to their placement.

.lt will, of course, be understood that instead of being cylindrical in cross section the gatesmayhave any cross sectional form and where a collapsible gate is employed the peg ll will take Va form of such cross section as will fully distend the gate when it is positioned.

It has been found in actual practice that gates of the type above described that in so far as the head of the jointing material is concerned, nothing is left to the discretion of the workmen and no trouble Vis en perienced with leakage at the joint adjacent the gate. Again, with material which is not calked not only must the gate be suiiiciently high but it must have ample cross sec lion so as to fill the joint as rapidly as possible. Experience has shown that workmen. will consistently contract the diameter of the gates which are built in the ordinary manner, but by the use of the gate as above set forth this diiiiculty is obviated. Again where the gatelis made of wood, clay or like substances, it abstracts heat very rapidly from the inflowing sealing material, causing it to harden next to the clay, thus contracting the opening as the pouring proceeds;

especially is this a serious matter in cold weather. On the other hand with the paper gate the radiation of heat is much less rapid with the result that the opening for the How of the sealing material contracts very slowly. When clay gates alone are used considerable clay adheres to the cold sealing material and must be removed before the material may be thrown back into the batch to be remelted. Where clay has been employed it is found vnecessary often times to emplov a scrubbing brush to remove t-he clay. This, of course, is a considerable task, especially in cold weather, a factor which is entirely done away with with the paper gate. Again the construction of the ordinary clay gate revour names to this specification.

quires someV degree 'of' skill asl well as the consumption of time. As a consequence of the use of the paper-gate it expe'dites-.the work of jointing pipes and materially simplies the operation.

l lllhile wehave referred to a specific jointinginaterial it is to be understood that the gate may be employed with any suitable material.l Y j j Where a rubber gates is utilized instead of paper, as above set forth, itpossesses the advantages of the paperexcept forthe fact that it .is moreexpensive to produce. Such rubber gate may, however, be readily -removed from the solidified material after the joint is poured before or after the projectingpart is knocked away though preferablyV after the projection has been removed from the joint as it is easier to strip or turn the gate downwardly over the tapering portion of the solidied column than it is to distend and stretch the gate in the act of pulling it upward over the larger portion of the column of solidified material. r

What is claimed is: Y

l. As a new article of manufacture, a gate for use Vin producing poured ,pipe joints, formed of paper and having its lower end cut away or removed at one side.

2. As a new article 'of manufacture, a gate for use in producing poured pipe joints, formed of paper and having a foot piece at its lower end.

3. As anew article of manufacture, a gate for use in producing poured pipe joints, formed of paper having a surface finish nonadhejrent with reference to the jointing materia 4. As a new 'article of manufacture, a gate for use in producing` poured pipe joints formed of paper having` a glazed surface.

5. As anew article of manufacture, a` gate for use in producing poured pipe joints, formed of paper, said gate tapering' in crosssection from the upper to the lower end and provided withl a cutaway portion at one side at such'lower end. Y

6. As a new article of manufacture, a collapsible gate for use in producing poured pipe joints, formed of paper` and having a foot piece formed as an extension of the body and to one side of the longitudinal lines of folds produced in the act of collapsing the gate. Y

7. A thin walled collapsible gate substantially circular incross section when distended and having its lower marginal portion Vcut away at one side.V

In testimony whereof we have ROBERT n. HOWELL. CHARLES A HOWELL,

signedl 

